European black grouse vs heathfowl

European black grouse and heathfowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
European black grouse	Yes	No	No	No
heathfowl	Yes	No	No	No

As nouns, European black grouse and heathfowl are synonyms defined as:

European black grouse and heathfowl: large northern European grouse that is black with a lyre-shaped tail

Other synonyms of European black grouse include Lyrurus tetrix.

European black grouse (noun)	heathfowl (noun)
large northern European grouse that is black with a lyre-shaped tail	large northern European grouse that is black with a lyre-shaped tail